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Kraus [1989], and Dean et al. [1993]) to include gravitational effects is given by

D. ah 1 (ECg) =D. (1.14)
m 9y h ay

in which the first term on the left-hand side represents destabilizing forces due to gravi-

ty, and the second term represents turbulent fluctuations due to wave energy dissipation.

Table 1.1: Summary of Recommended A Values (from Dean [1994])
(Units of A Parameter are in m"3)

Notes:

(1) The A values above, some to four place, are not intended to suggest that they are known to that accura-
cy, but rather are presented for consistency and sensitivity tests of the effects of variation in grain size.

(2) As an example of use of the values in the table, the A value for a median sand size of 0.24 mm is:
A = 0.112 mu3. To covert A values to feet units, multiply by 1.5.